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Navbodh Biology Class 12 PDF Free Download for Students
What is the branch of science that focuses on the study of insects?
(a) Ichthyology
(b) Entomology
(c) Parasitology
(d) Malacology
Option b – Entomology
Which field studies Population characteristics and human demographics?
(a) Ecology
(b) Genetics
(c) Demography
(d) Virology
Option c – Demography
Zoology is primarily concerned with the study of
(a) Only living animals
(b) Only living plants
(c) Both living and extinct animals
(d) Both living and extinct plants
Option c – Both living and extinct animals
The scientific term used for the study of flowers is
(a) Phrenology
(b) Anthology
(c) Agrostology
(d) Palynology
Option b – Anthology
The scientific comparison and analysis of different human cultures is known as
(a) Ethnology
(b) Ethnography
(c) Ethology
(d) Ethics
Option a – Ethnology
The discipline that applies principles of biological systems to engineering and Technology is called
(a) Bionics
(b) Bionomics
(c) Bionomy
(d) Biometry
Option a – Bionics
Palaeobotany mainly deals with the study of
(a) Animal fossils
(b) Algae
(c) Fungi
(d) None of the Above
Option d – None of the Above
The practice of breeding and rearing silkworms is known as
(a) Apiculture
(b) Horticulture
(c) Sericulture
(d) Floriculture
Option c – Sericulture
Honey bees are primarily associated with
(a) Sericulture
(b) Tissue Culture
(c) Apiculture
(d) Pisciculture
Option c – Apiculture
Which of the following pairs is incorrectly matched?
(a) Floriculture – Cultivation of flowers
(b) Agronomy – Crop production
(c) Horticulture – Vegetable cultivation
(d) Pomology – Fruit cultivation
Option c – Horticulture – Vegetable cultivation
Which of the following combinations is not correct?
(a) Apiculture – Honey bee
(b) Sericulture – Silkworm
(c) Pisciculture – Lac insect
(d) Horticulture – Flowers
Option c – Pisciculture – Lac insect
Which of the following word–meaning pairs is correctly matched?
(a) Lexicography – Dictionary compilation
(b) Philology – Stamp collection
(c) Entomology – Study of the human body
(d) Iconography – Study of insects
Option a – Lexicography – Dictionary compilation
Lexicography refers to the study or preparation of
(a) Human Anatomy
(b) Dictionaries
(c) Handwriting analysis
(d) Visual teaching aids
Option b – Dictionaries
The study of plants cultivated and used as vegetables is called
(a) Floriculture
(b) Pomology
(c) Horticulture
(d) Olericulture
Option d – Olericulture
Viticulture is related to the production of
(a) Silk
(b) Earthworms
(c) Honey
(d) Grapes
Option d – Grapes
Vermiculture refers to
(a) Rearing of worms
(b) Study of animals
(c) Study of fishes
(d) Elimination of worms
Option a – Rearing of worms
The organism commonly used in vermiculture is
(a) Tapeworm
(b) Silkworm
(c) Threadworm
(d) Earthworm
Option d – Earthworm
Gerontology is the branch of science concerned with
(a) Childhood
(b) Women’s Health
(c) Skin disorders
(d) Old age
Option d – Old age
Genetics mainly deals with the study of
(a) Mendel’s principles
(c) DNA structure
(d) Inheritance and variation
Option d – Inheritance and variation
The scientific study related to ageing and elderly people is called
(a) Oncology
(b) Gerontology
(c) Teratology
(d) Ornithology
Option b – Gerontology
The term used for the study of ageing is
(a) Gerontology
(b) Ethnology
(c) Anthropology
(d) Thanatology
Option a – Gerontology
Pedology is associated with the study of
(a) Atmosphere
(b) Soil
(c) Environmental pollutants
(d) Seeds
Option b – Soil
Which branch of science deals with the study of bones?
(a) Osteology
(b) Orology
(c) Serology
(d) Geology
Option a – Osteology
The scientific study of snakes is known as
(a) Serpentology
(b) Ornithology
(c) Herpetology
(d) Ichthyology
Option a – Serpentology
A philatelist is a person who
(a) Collects coins
(b) Collects stamps
(c) Collects bird photographs
(d) Collects feathers
Option b – Collects stamps
Identify the odd one out
(a) Physiology
(b) Psychology
(c) Pathology
(d) Bacteriology
Option b – Psychology
Which group has the highest number of species identified by biologists so far?
(a) Fungi
(b) Plants
(c) Insects
(d) Bacteria
Option c – Insects
Animals that can control and keep their internal body temperature nearly constant are called
(a) Animals whose body temperature is lower than the surroundings
(b) Animals whose body temperature is higher than the surroundings
(c) Animals that maintain an almost constant body temperature
(d) Animals whose body temperature equals the air temperature
Option c – Animals that maintain an almost constant body temperature
Which of the following is regarded as a true fish?
(a) Silverfish
(b) Crayfish
(c) Jellyfish
(d) Catfish
Option d – Catfish
Which one among the following is a true fish?
(a) Starfish
(b) Jellyfish
(c) Dogfish
(d) Seahorse
Option d – Seahorse
Which Animal is the largest mammal found on Earth?
(a) Whale
(b) African elephant
(c) Hippopotamus
(d) Polar bear
Option a – Whale
Whales belong to which biological group?
(a) Fishes
(b) Mammals
(c) Reptiles
(d) Amphibians
Option b – Mammals
Which of the following animals is a member of the class Mammalia?
(a) Shark
(b) Squid
(c) Octopus
(d) Whale
Option d – Whale
Which species is the largest among the toothed whales?
(a) Finback whale
(b) Blue whale
(c) Sperm whale
(d) Humpback whale
Option c – Sperm whale
Which mammal lays eggs instead of giving birth to young ones?
(a) Echidna
(b) Kangaroo
(c) Porcupine
(d) Whale
Option a – Echidna
Which mammal has the ability of true flight?
(a) Jaguar
(b) Ostrich
(c) Pelican
(d) Bat
Option d – Bat
Which flying organism does not belong to the class Aves?
(a) Bat
(b) Crow
(c) Eagle
(d) Parrot
Option a – Bat
Dolphins are classified under which group?
(a) Fish
(b) Amphibians
(c) Reptiles
(d) Mammals
Option d – Mammals
A seal belongs to which group of animals?
(a) Fish
(b) Bird
(c) Reptile
(d) Mammal
Option d – Mammal
Amphibians are animals that generally live
(a) Only in water
(b) Only on land
(c) Both on land and in water
(d) Only in fast-flowing water
Option c – Both on land and in water
Which feature most clearly distinguishes humans from apes?
(a) Curiosity for knowledge
(b) Reduced sense of smell
(c) Opposable thumb
(d) Broad chin
Option a – Curiosity for knowledge
Which of the following is not an ape?
(a) Gibbon
(b) Gorilla
(c) Langur
(d) Orangutan
Option c – Langur
Which is the smallest among man-like apes?
(a) Gibbon
(b) Chimpanzee
(c) Gorilla
(d) Orangutan
Option a – Gibbon
Nilgai is closely related to which Animal group?
(a) Cow
(b) Goat
(c) Sheep
(d) Deer
Option d – Deer
Octopus belongs to which phylum?
(a) Arthropoda
(b) Echinodermata
(c) Hemichordata
(d) Mollusca
Option d – Mollusca
Which is the largest known invertebrate?
(a) Octopus
(b) Squid
(c) Coral
(d) Jellyfish
Option b – Squid
Which of the following does not belong to the same class as the others?
(a) Crab
(b) Mite
(c) Scorpion
(d) Spider
Option a – Crab
White Leghorn refers to a breed of
(a) Parrot
(b) Peacock
(c) Fowl
(d) Owl
Option c – Fowl
Ticks and mites are classified as
(a) Arachnids
(b) Crustaceans
(c) Insects
(d) Myriapods
Option a – Arachnids
A glow worm is actually
(a) A mollusc
(b) An insect
(c) A true worm
(d) A nematode
Option b – An insect
Which of the following Organisms is not an insect?
(a) Bed bug
(b) Spider
(c) Housefly
(d) Mosquito
Option b – Spider
Spiders differ from insects mainly because spiders have
(a) Six legs
(b) Eight legs
(c) Ten legs
(d) Twelve legs
Option b – Eight legs
Which of the following is not an insect?
(a) Butterfly
(b) Cockroach
(c) Mosquito
(d) Spider
Option d – Spider
Which group includes animals that are mostly active during the night?
(a) Housefly, bed bug, parrot
(b) Mosquito, bats, owl
(c) Mosquito, sparrow, deer
(d) Owl, bats, dog
Option b – Mosquito, bats, owl
Which Animal stores water within its intestinal tract?
(a) Moloch
(b) Camel
(c) Zebra
(d) Uromastix
Option b – Camel
The poison gland in snakes is evolutionarily related to
(a) Electric organs of fish
(b) Sting of rays
(c) Sebaceous glands of mammals
(d) Salivary glands of vertebrates
Option d – Salivary glands of vertebrates
Snake fangs used for injecting venom are modified
(a) Mandibular teeth
(b) Palatine teeth
(c) Canine teeth
(d) Maxillary teeth
Option d – Maxillary teeth
Plants that naturally grow on rocky surfaces are known as
(a) Epiphytes
(b) Halophytes
(c) Xerophytes
(d) Lithophytes
Option d – Lithophytes
Which of the following plants feeds on insects?
(a) Passion flower
(b) Pitcher plant
(c) Night queen
(d) Flame of the Forest
Option b – Pitcher plant
In pitcher plants, the pitcher structure develops from the
(a) Stem
(b) Leaf
(c) Stipule
(d) Petiole
Option b – Leaf
Which plant part is best suited for observing meiosis?
(a) Shoot apex
(b) Root apex
(c) Anthers
(d) Leaf cells
Option c – Anthers
Which of the following pairs is incorrectly matched?
(a) Yeast – Fermentation
(b) Casein – Milk protein
(c) Aloe vera – Angiosperm
(d) Nepenthes – Parasitic angiosperm
Option d – Nepenthes – Parasitic angiosperm
Nepenthes khasiana, a rare and endangered plant, is naturally found in
(a) Himachal Pradesh
(b) Madhya Pradesh
(c) Meghalaya
(d) Uttar Pradesh
Option c – Meghalaya
In which part of the cinchona plant does quinine naturally accumulate?
(a) Root
(b) Fruit
(c) Seed
(d) Bark
Option d – Bark
Malaria is caused by which type of organism?
(a) Diseased plant tissue
(b) Fungus
(c) Bacterium
(d) Alga
Option a – Diseased plant tissue
Quinine from cinchona bark was once used to treat malaria. Which synthetic medicine later replaced it?
(a) Chloromycetin
(b) Chloroquine
(c) Tetracycline
(d) Ampicillin
Option b – Chloroquine
Which group of Organisms helps in confirming death due to drowning?
(a) Lichens
(b) Protozoans
(c) Cyanobacteria
(d) Diatoms
Option d – Diatoms
The mulberry is botanically classified as which type of fruit?
(a) Sorosis
(b) Syconus
(c) Samara
(d) Nut
Option a – Sorosis
Which fibre listed below is not obtained from the stem of a plant?
(a) Flax
(b) Hemp
(c) Jute
(d) Cotton
Option d – Cotton
Leg-haemoglobin is present in
(a) Human blood
(b) Rabbit blood
(c) Root nodules of leguminous plants
(d) Chicken blood
Option c – Root nodules of leguminous plants
Which of the following cereals is artificially developed and not naturally occurring? ( Navbodh Biology Class 12 PDF Free Download )
(a) Dwarf wheat
(b) Hybrid maize
(c) Triticale
(d) Soyabean
Option c – Triticale
Canola refers to specially bred mustard varieties. Their key feature is that the ( Navbodh Biology Class 12 PDF Free Download )
(a) Seeds have extremely high oil content
(b) Oil contains a high proportion of unsaturated fatty Acids
(c) Oil remains stable for long storage
(d) Oil has negligible uric Acid
Option d – Oil has negligible uric Acid
Bacteria are best viewed using a ( Navbodh Biology Class 12 PDF Free Download )
(a) Naked eye
(b) Compound microscope
(c) Hand lens
(d) Electron microscope
Option b – Compound microscope
Spongy tissue, a disorder affecting mango export quality, is most commonly seen in which variety? ( Navbodh Biology Class 12 PDF Free Download )
(a) Alphonso
(b) Dashehari
(c) Neelum
(d) Langra
Option a – Alphonso
Which statement regarding bacteria is correct? ( Navbodh Biology Class 12 PDF Free Download )
(a) They exist between living and non-living forms
(b) They represent a transition between plants and animals
(c) They lie between flowering and non-flowering plants
(d) None of the above
Option d – None of the above
Desert plants usually develop long root systems because ( Navbodh Biology Class 12 PDF Free Download )
(a) High soil temperature stimulates root growth
(b) Roots extend deeper to locate water
(c) Compact soil forces roots to elongate
(d) Roots grow away from Solar Heat
Option b – Roots extend deeper to locate water
Phreatophytes found in deserts are plants that possess ( Navbodh Biology Class 12 PDF Free Download )
(a) Thick, fleshy stems
(b) Lipid-rich leaves
(c) Extremely long tap roots
(d) Reduced or spine-like leaves
Option c – Extremely long tap roots
Plants adapted to arid environments are known as ( Navbodh Biology Class 12 PDF Free Download )
(a) Epiphytes
(b) Xerophytes
(c) Hydrophytes
(d) Mesophytes
Option b – Xerophytes
Desert plants are typically ( Navbodh Biology Class 12 PDF Free Download )
(a) Viviparous
(b) Succulent
(c) Herbaceous
(d) Heterophyllous
Option b – Succulent
Plants growing in saline soils are called ( Navbodh Biology Class 12 PDF Free Download )
(a) Xerophytes
(b) Hydrophytes
(c) Halophytes
(d) Succulents
Option c – Halophytes
Epiphytes mainly depend on host plants for ( Navbodh Biology Class 12 PDF Free Download )
(a) Nutrition
(b) Physical support
(c) Shade
(d) Water
Option b – Physical support
Maximum water absorption in plants occurs through ( Navbodh Biology Class 12 PDF Free Download )
(a) Embryonic zone
(b) Growing point
(c) Elongation zone
(d) Root hairs
Option d – Root hairs
A hydrophyte refers to ( Navbodh Biology Class 12 PDF Free Download )
(a) A marine Animal
(b) A water-living plant
(c) A plant Disease
(d) A plant without roots
Option b – A water-living plant
Absorption of radiant energy by plants results in ( Navbodh Biology Class 12 PDF Free Download )
(a) Splitting of water molecules
(b) Oxidation of chlorophyll
(c) Reduction of oxygen
(d) Oxidation of carbon dioxide
Option a – Splitting of water molecules
Which of the following pairs is incorrectly matched? ( Navbodh Biology Class 12 PDF Free Download )
(a) Autotroph – Producer
(b) Heterotroph – Consumer
(c) Saprotroph – Decomposer
(d) Herbivore – Secondary consumer
Option d – Herbivore – Secondary consumer
Trophic level I mainly includes ( Navbodh Biology Class 12 PDF Free Download )
(a) Herbivorous animals
(b) Carnivorous animals
(c) Omnivorous animals
(d) Green plants
Option d – Green plants
Certain archaebacteria are used commercially for producing ( Navbodh Biology Class 12 PDF Free Download )
(a) Ethane
(b) Methane
(c) Acids
(d) Alcohols
Option b – Methane
Most insects respire by means of ( Navbodh Biology Class 12 PDF Free Download )
(a) Skin
(b) Gills
(c) Lungs
(d) Tracheal tubes
Option d – Tracheal tubes
Fish survive beneath frozen lakes because ( Navbodh Biology Class 12 PDF Free Download )
(a) They are warm-blooded
(b) They hibernate under ice
(c) Water near the bottom remains unfrozen
(d) Ice conducts Heat efficiently
Option c – Water near the bottom remains unfrozen
Fish die when removed from water mainly because ( Navbodh Biology Class 12 PDF Free Download )
(a) They absorb too much oxygen
(b) Their body temperature rises
(c) They are unable to respire
(d) They cannot swim
Option c – They are unable to respire
Fish usually breathe through ( Navbodh Biology Class 12 PDF Free Download )
(a) Skin
(b) Nose
(c) Gills
(d) Fins
Option c – Gills
The red colour seen in apples is due to the pigment ( Navbodh Biology Class 12 PDF Free Download )
(a) Anthocyanin
(b) Lycopene
(c) Carotene
(d) Xanthophyll
Option a – Anthocyanin
The red colour of tomatoes is mainly due to ( Navbodh Biology Class 12 PDF Free Download )
(a) Capsaicin
(b) Lycopene
(c) Xanthophyll
(d) None of these
Option b – Lycopene
The yellow colour of papaya is caused by ( Navbodh Biology Class 12 PDF Free Download )
(a) Papain
(b) Lycopene
(c) Caricaxanthin
(d) Carotene
Option c – Caricaxanthin
Opium is obtained from which part of the poppy plant? ( Navbodh Biology Class 12 PDF Free Download )
(a) Flower
(b) Leaves
(c) Unripe fruits
(d) Roots
Option c – Unripe fruits
Which of the following groups belongs to the same species? ( Navbodh Biology Class 12 PDF Free Download )
(a) Chinese, Americans, Indians, and Africans
(b) Tigers, lions, and cats
(c) Pigeons, doves, and partridges
(d) Lizards, crocodiles, and snakes
Option a – Chinese, Americans, Indians, and Africans
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